Roadway.



No. 650,7I0. Patented; May 29, 1900. H. DUNLOP.

ROADWAY.

[Application filed June 27, 1899) (No Model.)

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UNITED 'STATES ATENT Fries.

HUGH DUNLOP, OF SYDNEY, NEYV SOUTH ALES.

ROADWAY.

SPECIFICATION forming part of Letters Iatent N0. 650,710, dated May 29, 1900.

Application filed June 2'7, 1899. Serial No. 722,094. (No model.)

To aZZ whom, it may concern:

Be it known that 1, HUGE DUNLOP, residing at 43 Sloane street, Summer Hill, Sydney, in the Colony of New SouthWValeahave invented a certain new and useful Roadway, of which the following is a description.

My invention relates to roadways having wooden paving-blocks as a foundation, my object being to provide an efiicient and du rable covering for the blocks, which produces a good roadway and also preserves the wood.

To these ends my invention consists in the various matters hereinafter described and claimed.

The drawing illustrates in sectional elevaiion aportion of a roadway constructed in accordance with the present invention.

In carrying out my invention I employ two mixtures or divisions,which I shall hereinafter call the first and second mixtures.

To make the first mixture, I employ the following ingredients in the proportions indicated, viz: two hundredweight of blue-metal screenings, one hundredweight Portland cement, one-half cwt.) hundredweight caustic soda, three hundred weight resin, and two hundredweight calcined clay. To mix these together, the resin and caustic soda are boiled in water, and when cooled the mixture is combined with the Portland cement, calcined clay, and blue-metal screenings.

To make the second mixture, I employ the following ingredients in the proportions indicated, viz: two hundredweight of bitumen, (placed in aboilerorvat,) on'e hundredweight of resin, two and one-half (2 gallons boiled linseed-oil, and twelve gallons of Stockholm tar. lVhen theseingredients are boiled to a thoroughly-liquid state, I add two hundredweight calcined clay, two hundredweight of blue-metal screenings, and any quantity of sand that may be deemed necessary.

I first coat the blocks with the first mixture and allow the same to remain about six hours to solidify in order to form a preservative for the blocks and also to act as a gripper to the ering wood blocks will be solid, and the roadway thus formed will allow of the heaviest traffic passing over it without in any way destroying or damaging it.

The thickness of the compositions when set on wood blocks is about half an inch, according to the requirements of the place, so that besides being very efficacious it will be found also to be a very economical. top dressing.

Having now particularly described and as certained the nature of my said invention and in what manner the same is to be performed, I desire to state I-do not in any way claim the use of wood blocks in the formation of roadways and foot-paths; but

What I claim is In a roadway or the like, a layer of wooden paving-blocks, a composition adjacent to and covering said blocks, said composition being composed of the following ingredients, viz., blue-metal screenings, Portland cement,caus tic soda, resin and calcined clay, and a second composition adjacent to and covering said first-mentioned composition, said second composition being composed of the following ingredients, viz., bitumen, boiled linseed-oil, resin, Stockholm tar, calcined clay, bluemetal screenings and sand; substantially as described.

In testimony whereof I have hereunto set my hand this 7th day of March, 1899.

HUGH DUN LOP.

Witnesses:

JAMEs BAKER, ROBERT MALLENSON. 

